- published: 02 Nov 2013
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A bipolar (junction) transistor (BJT) is a three-terminal electronic device constructed of doped semiconductor material and may be used in amplifying or switching applications. Bipolar transistors are so named because their operation involves both electrons and holes. Charge flow in a BJT is due to bidirectional diffusion of charge carriers across a junction between two regions of different charge concentrations. This mode of operation is contrasted with unipolar transistors, such as field-effect transistors, in which only one carrier type is involved in charge flow due to drift. By design, most of the BJT collector current is due to the flow of charges injected from a high-concentration emitter into the base where there are minority carriers that diffuse toward the collector, and so BJTs are classified as minority-carrier devices.
An NPN transistor can be considered as two diodes with a shared anode. In typical operation, the base-emitter junction is forward biased and the base–collector junction is reverse biased. In an NPN transistor, for example, when a positive voltage is applied to the base–emitter junction, the equilibrium between thermally generated carriers and the repelling electric field of the depletion region becomes unbalanced, allowing thermally excited electrons to inject into the base region. These electrons wander (or "diffuse") through the base from the region of high concentration near the emitter towards the region of low concentration near the collector. The electrons in the base are called minority carriers because the base is doped p-type which would make holes the majority carrier in the base.
If it wasn't for you!
Do I believe in the resurrection of Christ?
And did His death bring forth new life?
And did He raise up and bring back Lazurus from the
grave?
Is there supposed to be a Second Coming?
Am I wrong because I'm wondering
Why the fallen Babylon is up and alive today?
And do I really believe in the Mark of the Beast
Cause he's still dwelling up in my streets
Strapped and ready to fight this war
And he's got more guns than you and me
And most people don't wanna believe
That they still prejudice, simply because we poor
Do I believe that Mother Teresa was an angel on this
earth
And thou shall love thy neighbor, even if he acts like
you?
Do believe in Heaven and Hell, shoot, hell yeah I do
Cause we alive today, and my crew is living proof
If it wasn't for you!
None of this would ever mean a thing
If it wasn't for you!
Tell me why else would I believe
What I believe
Do I believe that the Rider of the White Horse
Is coming back for the righteous?
And the Morning Star keeps getting brighter every day?
Is there such a thing as good and evil
Still division amongst the people?
And we're not all created equally, just because you say
Do I believe in the Trinity?
And will I live eternally?
Even though I'm not quite the saint that you claim to
Did Dr. Martin Luther have a dream?
Was Haile Sillasi a king?
And is it okay to sometimes feel a little bit confused?
Will Armagedon ever come?
I'm not perfect, just forgiven
And I might just push back the next time you shove
Do I believe in One God, one aim and destiny?
Just don't forget your First Love
That's what my mom used to tell me
If it wasn't for you!
None of this would ever mean a thing
If it wasn't for you!
Tell me why else would I believe
(What I believe)
If it wasn't for you!
Then none of this is for nothing
It's all for nothing!
It's all for nothing!
It's all for nothing!
If it wasn't for you!
None of this would ever mean a thing
If it wasn't for you!
Tell me why else would I believe
(What I believe)
If it wasn't for you!
None of this would ever mean a thing
(What I believe)
If it wasn't for you
(Would I believe)
If it wasn't for you